include @JsonbGraph to (de)serialize subset of Json-B entity

Would be nice to have filter/query cabapilities to (de)serialize only a subset of the Json-B entity per config.

**For example:**

```
// (de)serialize only "id", tasks and their name
@JsonbGraph(name= "ItemWithTasks" value = {"id", "tasks", "tasks.name"})
public class Item {

private int id;
private String description;
private Set tasks;
}
```

and use it like:

```
var item = new Item(..);
var toJson = JsonbBuilder.create().withGraph("ItemWithTasks").toJson(item);
var fromJson = JsonbBuilder.create().withGraph("ItemWithTasks").fromJson(toJson)
```

The `@JsonbGraph` can provide capabilities like **GraphQL** or **JPA FetchGraph**.

No file, test, or entry point is named. Start by reading the existing Json-B API around JsonbBuilder and compare the requested graph behavior with the cited GraphQL and JPA FetchGraph concepts. Done would require an agreed scope and acceptance criteria for @JsonbGraph, including both serialization and deserialization.

Written by the indexing model from the issue text.